CN103513134B - Comprehensive diagnosis device and method for power on-site terminal faults - Google Patents
Comprehensive diagnosis device and method for power on-site terminal faults Download PDFInfo
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Abstract
The invention discloses a comprehensive diagnosis device and method for power on-site terminal faults. The device comprises a handheld terminal, an RS485 adapter, a carrier meter reading controller and a high frequency probe set, the RS485 adapter, the carrier meter reading controller and the high frequency probe set are respectively connected with the handheld terminal, the RS485 adapter further communicates with a power on-site terminal through an RS485 bus, the carrier meter reading controller is further connected to a power line of the power on-site terminal through a power cable, and the high frequency probe set is in wireless connection with a GPRS communication module. According to the comprehensive diagnosis device, the handheld terminal is convenient to carry and use, powerful and capable of conducting diagnosis on the faults, occurring on site, of the power on-site terminal, and therefore the comprehensive diagnosis device has good application prospects.
Description
Technical field
The present invention relates to a kind of electric power on-site terminal synthetic fault diagnosis device and method, belonged to technical field of power systems.
Background technology
Along with the fast development of power technology, the fault that power consumer occurs electric power on-site terminal, find that timely the requirement of processing is more and more higher, electric power on-site terminal usually there will be the problem of part reading electric meter failure at the scene, as communication failure, electromagnetic interference (EMI), the phenomenons such as terminal meter reading data error, the diagnostic function of traditional electric power on-site terminal trouble-shooter is too single, the diagnosis that just meets communication failure having, the diagnosis of the fault that some terminal meter reading datas occur, be not suitable for the comprehensive diagnos of electric power on-site terminal various faults, need multiple devices to diagnose, line complexity, complicated operation, use inconvenient, the volume of complete machine is excessive, be inconvenient to carry, the diagnosing malfunction that can not occur at the scene electric power on-site terminal timely.
Summary of the invention
Object of the present invention overcomes traditional electric power on-site terminal trouble-shooter function singleness of the prior art, and line complexity, is inconvenient to carry, the problem of the diagnosing malfunction that can not occur at the scene electric power on-site terminal timely.Electric power on-site terminal synthetic fault diagnosis device and method of the present invention, is handheld terminal, is convenient for carrying, and powerful, easy to use, the diagnosing malfunction that can occur at the scene electric power on-site terminal timely, has a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of electric power on-site terminal synthetic fault diagnosis device, it is characterized in that: comprise handheld terminal, RS485 adapter, carrier wave is copied control device and high frequency probe group, described RS485 adapter, carrier wave is copied control device and is connected with handheld terminal respectively with high frequency probe group, described RS485 adapter also carries out communication by RS485 bus and electric power on-site terminal, described carrier wave is copied control device also on the power lead by power cable and electric power on-site terminal, the GPRS communication module wireless connections of described high frequency probe group and electric power on-site terminal, with RS485 adapter, the rear end of the electric power on-site terminal that high frequency probe group communicates is connected with ammeter, the rear end of copying the electric power on-site terminal that is connected of control device with carrier wave is connected with ammeter by collector.
Aforesaid electric power on-site terminal synthetic fault diagnosis device, it is characterized in that: described handheld terminal comprises CPU, power conversion unit, battery, battery capacity detecting unit, data bus interface, wireless module, Channel-shifted interface, real-time clock unit, JTAG, matrix keyboard unit, described battery provides working power by power conversion unit, described battery is also connected with CPU by battery capacity detecting unit, described data bus interface, wireless module, Channel-shifted interface, JTAG, real-time clock unit, matrix keyboard unit is connected with CPU respectively, described Channel-shifted interface rear end is connected with RS232 interface, RS485 interface, electric current loop interface and infrared interface, described data bus interface comprises image electronic LCD interface, NOR FLASH interface, NAND FLASH interface, SRAM interface, D12 interface.
Aforesaid electric power on-site terminal synthetic fault diagnosis device, is characterized in that: described high frequency probe group is made up of multiple 8502A high frequency probes.
The diagnostic method of the electric power on-site terminal synthetic fault diagnosis device based on above-mentioned, is characterized in that: comprises the following steps,
Step (1), sets up diagnosis and connects, and handheld terminal is connected with the RS485 interface of electric power on-site terminal by RS485 adapter; Handheld terminal is set up wireless telecommunications by the GPRS communication module of high frequency probe group and electric power on-site terminal; Handheld terminal is copied control device by carrier wave and is connected with the power lead of electric power on-site terminal;
Step (2), to the RS485 communication failure diagnosis of electric power on-site terminal, record diagnosis information;
Step (3), to the GPRS communication failure diagnosis of electric power on-site terminal, record diagnosis information;
Step (4), to the carrier communication fault diagnosis of electric power on-site terminal, record diagnosis information;
Step (5), to the electromagnetic interfere diagnose of electric power on-site terminal, record diagnosis information;
Step (6), to the meter reading data problem diagnosis of electric power on-site terminal, record diagnosis information;
Step (7), reads the clock data of electric power on-site terminal, compares with handheld terminal clock, and operation when electric power on-site terminal is carried out to school.
Aforesaid electric power on-site terminal synthetic fault diagnosis method, is characterized in that: step (2), and the method for the RS485 communication failure diagnosis to electric power on-site terminal is as follows,
(1) handheld terminal is selected ammeter communication protocol corresponding to ammeter connecting with corresponding electric power on-site terminal rear end, carries out the copy reading test of ammeter; ;
(2) if copy reading is successful, carry out (3); If copy reading is unsuccessful, the RS485 interface of ammeter breaks down, and changes ammeter, repeats (1), until copy reading success;
(3) handheld terminal penetrates copy reading to electric power on-site terminal, records the ammeter data under this electric power on-site terminal, realizes point communications functionality test;
(4) if penetrate copy reading success, the RS485 communication of electric power on-site terminal is normal; If it is unsuccessful to penetrate copy reading, electric power on-site terminal breaks down to the circuit of ammeter, changes being connected between ammeter and electric power on-site terminal, repeats (3), until penetrate copy reading success;
(5) handheld terminal, by regulating the resistance of RS485 adapter, is tested the driving force of RS485 bus.
Aforesaid electric power on-site terminal synthetic fault diagnosis method, is characterized in that: step (3), and the method for the GPRS communication failure diagnosis to electric power on-site terminal is,
(1) handheld terminal checks that whether messaging parameter setting is correct;
(2) if correct, carry out (3); If incorrect, reset messaging parameter, and successful with master station communication, repeat (1), until handheld terminal checks that messaging parameter arranges correctly;
(3) wireless module of handheld terminal reads the signal intensity of corresponding electric power on-site terminal, and draws the strength grade of the signal intensity of reception;
(4) according to the strength grade of the signal intensity receiving, judge the signal strength of local operator, if strength grade is low, need disconnected local operator reload signal amplifier;
(5) handheld terminal checks the quality of SIM card, if SIM card is bad, changes SIM card;
(6) again judge whether handheld terminal detects successful with master station communication, if communicate by letter successfully, the GPRS communication of electric power on-site terminal is normal; If communication failure, returns to (1).
Aforesaid electric power on-site terminal synthetic fault diagnosis method, it is characterized in that: the strength grade of described signal intensity comprises no signal, weak, general, good and strong five grades, when being less than or equal to 5dBm, signal intensity is judged as no signal, a little less than being greater than 5dBm and being less than or equal to 12dBm and being judged as, being greater than 12dBm is less than or equal to 18dBm and is judged as generally, being greater than 18dBm is less than or equal to 24dBm and is judged as well, being greater than 24dBm is judged as by force, if when no signal, weak intensity grade, need local operator reload signal amplifier.
Aforesaid electric power on-site terminal synthetic fault diagnosis method, it is characterized in that: step (4), the method of the carrier communication fault diagnosis to electric power on-site terminal is the ammeter parameter message that handheld terminal reads the collector connecting with corresponding electric power on-site terminal rear end, checking electric power on-site terminal is to collector carrier communication function, the ammeter that collector is connected sends copy reading message, realizes the point-to-point communication of electric power on-site terminal to ammeter; Carrier wave message on handheld terminal monitoring power cable line, by the analysis to carrier wave message, judges whether to check meter successfully, realizes carrier communication fault diagnosis.
Aforesaid electric power on-site terminal synthetic fault diagnosis method, is characterized in that: step (5), and the method for the electromagnetic interfere diagnose to electric power on-site terminal is,
(1) handheld terminal gathers the electromagnetic radiation value of corresponding electric power on-site terminal by high frequency probe group;
(2) collection signal of high frequency probe group is carried out A/D conversion by handheld terminal;
(3) sampled value is carried out to discrete Fast Fourier Transform iterative inversion, obtain require 30MHz～1000MHz frequency range in the spectrum distribution value of collection signal at GB9254-2008;
(4) peak-peak, the respective frequencies of above-mentioned spectrum distribution value are presented on handheld terminal;
(5) in the time that peak-peak surmounts GB9254-2008 limit value, be wherein 40dB μ V/m at 30～230MHz, be 47dB μ V/m at 230～1000MHz, the radiation limit value of electric power on-site terminal exceeds standard, and occurs electromagnetic interference (EMI) fault.
Aforesaid electric power on-site terminal synthetic fault diagnosis method, is characterized in that: step (6), to the meter reading data problem diagnosis method of electric power on-site terminal be,
(1) handheld terminal reads respectively the history data of corresponding electric power on-site terminal, electric power on-site terminal rear end connection ammeter, compare analysis, the consistance of checking electric power on-site terminal copy reading ammeter, if consistent, the meter reading data of electric power on-site terminal is normal; If inconsistent, the meter reading data of electric power on-site terminal breaks down, and carries out (2);
(2) there is reason in handheld terminal reads corresponding electric power on-site terminal communication log, logout, analysis of failure, finds out the leakage of copy reading ammeter and copy data.
The invention has the beneficial effects as follows: electric power on-site terminal synthetic fault diagnosis device and method of the present invention is handheld terminal, is convenient for carrying, and powerful, diagnosing malfunction easy to use, can to occur at the scene electric power on-site terminal timely, has a good application prospect.
Brief description of the drawings
Fig. 1 is the system chart of electric power on-site terminal synthetic fault diagnosis device of the present invention.
Fig. 2 is the system chart of handheld terminal of the present invention.
Fig. 3 be the RS485 communication failure to electric power on-site terminal of the present invention diagnosis method process flow diagram.
Fig. 4 is the process flow diagram of the GPRS communication failure diagnostic method of the present invention to electric power on-site terminal.
Fig. 5 is the process flow diagram of the electromagnetic interference diagnostic method of the present invention to electric power on-site terminal.
Fig. 6 is the process flow diagram of the meter reading data problem diagnosis method of the present invention to electric power on-site terminal.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
As shown in Figure 1, a kind of electric power on-site terminal synthetic fault diagnosis device, comprise handheld terminal, RS485 adapter, carrier wave is copied control device and high frequency probe group, RS485 adapter, carrier wave is copied control device and is connected with handheld terminal respectively with high frequency probe group, RS485 adapter also carries out communication by RS485 bus and electric power on-site terminal, carrier wave is copied control device also on the power lead by power cable and electric power on-site terminal, the GPRS communication module wireless connections of high frequency probe group and electric power on-site terminal, with RS485 adapter, the rear end of the electric power on-site terminal that high frequency probe group communicates is connected with ammeter, the rear end of copying the electric power on-site terminal that is connected of control device with carrier wave is connected with ammeter by collector.
Described high frequency probe group is made up of multiple 8502A high frequency probes, and 8502A high frequency probe has good spectral characteristic, is that Agilent company manufactures, and moderate cost is easy to use.
Described RS485 adapter is the UT-9902 of UTEK company; Company of described carrier wave Chao Kongqiwei Neusoft carrier wave control device.
Described handheld terminal is the handheld terminal of BT3000E model, comprise CPU, power conversion unit, battery, battery capacity detecting unit, data bus interface, wireless module, Channel-shifted interface, real-time clock unit, matrix keyboard unit, described battery provides working power by power conversion unit, described battery is also connected with CPU by battery capacity detecting unit, described data bus interface, wireless module, Channel-shifted interface, real-time clock unit, matrix keyboard unit is connected with CPU respectively, described Channel-shifted interface rear end is connected with RS232 interface, RS485 interface, electric current loop interface and infrared interface, described data bus interface comprises image electronic LCD interface, NOR FLASH interface, NAND FLASH interface, SRAM interface, D12 interface, and wherein D12 interface is for upper PC communication for circumscribed USB mouth.
The diagnostic method of the electric power on-site terminal synthetic fault diagnosis device based on above-mentioned, comprises the following steps,
Step (1), sets up diagnosis and connects, and handheld terminal is connected with the RS485 interface of electric power on-site terminal by RS485 adapter; Handheld terminal is set up wireless telecommunications by the GPRS communication module of high frequency probe group and electric power on-site terminal; Handheld terminal is copied control device by carrier wave and is connected with the power lead of electric power on-site terminal;
Step (2), to the RS485 communication failure diagnosis of electric power on-site terminal, record diagnosis information, as shown in Figure 3, the method for the RS485 communication failure diagnosis to electric power on-site terminal is as follows,
(1) handheld terminal is selected ammeter communication protocol corresponding to ammeter connecting with corresponding electric power on-site terminal rear end, carries out the copy reading test of ammeter; ;
(2) if copy reading is successful, carry out (3); If copy reading is unsuccessful, the RS485 interface of ammeter breaks down, and changes ammeter, repeats (1), until copy reading success;
(3) handheld terminal penetrates copy reading to electric power on-site terminal, be handheld terminal by infrared interface to the order of the rubescent outer ammeter data reading system of electric power on-site terminal, electric power on-site terminal response command, hardware corridor using self as data transmit-receive, transmit data, record the ammeter data under this electric power on-site terminal, realize point communications functionality test;
(4) if penetrate copy reading success, the RS485 communication of electric power on-site terminal is normal; If it is unsuccessful to penetrate copy reading, electric power on-site terminal breaks down to the circuit of ammeter, changes being connected between ammeter and electric power on-site terminal, repeats (3), until penetrate copy reading success;
(5) handheld terminal, by regulating the resistance of RS485 adapter, is tested the driving force of RS485 bus;
Step (3), to the GPRS communication failure diagnosis of electric power on-site terminal, record diagnosis information, as shown in Figure 4, to the GPRS communication failure diagnostic method of electric power on-site terminal be,
(1) handheld terminal checks that whether messaging parameter setting is correct;
(2) if correct, carry out (3); If incorrect, reset messaging parameter, and successful with master station communication, repeat (1), until handheld terminal checks that messaging parameter arranges correctly;
(3) wireless module of handheld terminal reads the signal intensity of corresponding electric power on-site terminal, and draws the strength grade of the signal intensity of reception;
(4) according to the strength grade of the signal intensity receiving, judge the signal strength of local operator, if strength grade is low, need disconnected local operator reload signal amplifier;
The strength grade of the signal intensity here comprises no signal, weak, general, good and strong five grades, when being less than or equal to 5dBm, signal intensity is judged as no signal, a little less than being greater than 5dBm and being less than or equal to 12dBm and being judged as, being greater than 12dBm is less than or equal to 18dBm and is judged as generally, being greater than 18dBm is less than or equal to 24dBm and is judged as well, be greater than 24dBm and be judged as by force, if when no signal, weak intensity grade, need local operator reload signal amplifier;
(5) handheld terminal checks the quality of SIM card, if SIM card is bad, changes SIM card;
(6) again judge whether handheld terminal detects successful with master station communication, if communicate by letter successfully, the GPRS communication of electric power on-site terminal is normal; If communication failure, returns to (1);
Step (4), to the carrier communication fault diagnosis of electric power on-site terminal, record diagnosis information, carrier communication fault diagnosis is the ammeter parameter message that handheld terminal reads the collector connecting with corresponding electric power on-site terminal rear end, checking electric power on-site terminal is to collector carrier communication function, the ammeter that collector is connected sends copy reading message, realizes the point-to-point communication of electric power on-site terminal to ammeter; Carrier wave message on handheld terminal monitoring power cable line, by the analysis to carrier wave message, judges whether to check meter successfully, realizes carrier communication fault diagnosis.
Step (5), to the electromagnetic interfere diagnose of electric power on-site terminal, record diagnosis information, as shown in Figure 5, the method for the electromagnetic interfere diagnose to electric power on-site terminal is,
(1) handheld terminal gathers the electromagnetic radiation value of corresponding electric power on-site terminal by high frequency probe group;
(2) collection signal of high frequency probe group is carried out A/D conversion by handheld terminal;
(3) dsp processor in handheld terminal carries out discrete Fast Fourier Transform iterative inversion (FFT) to sampled value, obtains require 30MHz～1000MHz frequency range in the spectrum distribution value of collection signal at GB9254-2008;
(4) peak-peak, the respective frequencies of above-mentioned spectrum distribution value are presented on handheld terminal;
(5) in the time that peak-peak surmounts GB9254-2008 limit value, be wherein 40dB μ V/m at 30～230MHz, be 47dB μ V/m at 230～1000MHz, the radiation limit value of electric power on-site terminal exceeds standard, and handheld terminal gives a warning, and occurs electromagnetic interference (EMI) fault;
For example, when GPRS transmits data, electromagnetic radiation is the most serious, can be by the comparison of reading out data, for example control whether GPRS works, carrier-wave transmission data whether, judge the order of severity of single mode of operation, module electromagnetic radiation, and annoyance level to electric power on-site terminal copy reading ammeter data;
Step (6), to the meter reading data problem diagnosis of electric power on-site terminal, record diagnosis information, as shown in Figure 6, to the meter reading data problem diagnosis method of electric power on-site terminal be,
(1) handheld terminal reads respectively the history data of corresponding electric power on-site terminal, electric power on-site terminal rear end connection ammeter, compare analysis, the consistance of checking electric power on-site terminal copy reading ammeter, if consistent, the meter reading data of electric power on-site terminal is normal; If inconsistent, the meter reading data of electric power on-site terminal breaks down, and carries out (2);
(2) there is reason in handheld terminal reads corresponding electric power on-site terminal communication log, logout, analysis of failure, finds out the leakage of copy reading ammeter and copy data;
Step (7), reads the clock data of electric power on-site terminal, compares with handheld terminal clock, and operation when electric power on-site terminal is carried out to school.
In sum, electric power on-site terminal synthetic fault diagnosis device and method of the present invention, is handheld terminal, be convenient for carrying, and powerful, easy to use, the diagnosing malfunction that can occur at the scene electric power on-site terminal timely, has a good application prospect.
More than show and described ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is by appending claims and equivalent circle thereof.
Claims (7)
1. a diagnostic method for electric power on-site terminal synthetic fault diagnosis device, is characterized in that: comprises the following steps,
Step (1), sets up diagnosis and connects, and handheld terminal is connected with the RS485 interface of electric power on-site terminal by RS485 adapter; Handheld terminal is set up wireless telecommunications by the GPRS communication module of high frequency probe group and electric power on-site terminal; Handheld terminal is copied control device by carrier wave and is connected with the power lead of electric power on-site terminal;
Step (2), to the RS485 communication failure diagnosis of electric power on-site terminal, record diagnosis information;
Step (3), to the GPRS communication failure diagnosis of electric power on-site terminal, record diagnosis information;
Step (4), to the carrier communication fault diagnosis of electric power on-site terminal, record diagnosis information;
Step (5), to the electromagnetic interfere diagnose of electric power on-site terminal, record diagnosis information;
Step (6), to the meter reading data problem diagnosis of electric power on-site terminal, record diagnosis information;
Step (7), reads the clock data of electric power on-site terminal, compares with handheld terminal clock, and operation when electric power on-site terminal is carried out to school.
2. electric power on-site terminal synthetic fault diagnosis method according to claim 1, is characterized in that: step (2), and the method for the RS485 communication failure diagnosis to electric power on-site terminal is as follows,
(1) handheld terminal is selected ammeter communication protocol corresponding to ammeter connecting with corresponding electric power on-site terminal rear end, carries out the copy reading test of ammeter; ;
(2) if copy reading is successful, carry out (3); If copy reading is unsuccessful, the RS485 interface of ammeter breaks down, and changes ammeter, repeats (1), until copy reading success;
(3) handheld terminal penetrates copy reading to electric power on-site terminal, records the ammeter data under this electric power on-site terminal, realizes point communications functionality test;
(4) if penetrate copy reading success, the RS485 communication of electric power on-site terminal is normal; If it is unsuccessful to penetrate copy reading, electric power on-site terminal breaks down to the circuit of ammeter, changes being connected between ammeter and electric power on-site terminal, repeats (3), until penetrate copy reading success;
(5) handheld terminal, by regulating the resistance of RS485 adapter, is tested the driving force of RS485 bus.
3. electric power on-site terminal synthetic fault diagnosis method according to claim 1, is characterized in that: step (3), and the method for the GPRS communication failure diagnosis to electric power on-site terminal is,
(1) handheld terminal checks that whether messaging parameter setting is correct;
(2) if correct, carry out (3); If incorrect, reset messaging parameter, and successful with master station communication, repeat (1), until handheld terminal checks that messaging parameter arranges correctly;
(3) wireless module of handheld terminal reads the signal intensity of corresponding electric power on-site terminal, and draws the strength grade of the signal intensity of reception;
(4) according to the strength grade of the signal intensity receiving, judge the signal strength of local operator, if strength grade is low, need disconnected local operator reload signal amplifier;
(5) handheld terminal checks the quality of SIM card, if SIM card is bad, changes SIM card;
(6) again judge whether handheld terminal detects successful with master station communication, if communicate by letter successfully, the GPRS communication of electric power on-site terminal is normal; If communication failure, returns to (1).
4. electric power on-site terminal synthetic fault diagnosis method according to claim 3, it is characterized in that: the strength grade of described signal intensity comprises no signal, weak, general, good and strong five grades, when being less than or equal to 5dBm, signal intensity is judged as no signal, a little less than being greater than 5dBm and being less than or equal to 12dBm and being judged as, being greater than 12dBm is less than or equal to 18dBm and is judged as generally, being greater than 18dBm is less than or equal to 24dBm and is judged as well, being greater than 24dBm is judged as by force, if when no signal, weak intensity grade, need local operator reload signal amplifier.
5. electric power on-site terminal synthetic fault diagnosis method according to claim 3, it is characterized in that: step (4), the method of the carrier communication fault diagnosis to electric power on-site terminal is the ammeter parameter message that handheld terminal reads the collector connecting with corresponding electric power on-site terminal rear end, checking electric power on-site terminal is to collector carrier communication function, the ammeter that collector is connected sends copy reading message, realizes the point-to-point communication of electric power on-site terminal to ammeter; Carrier wave message on handheld terminal monitoring power cable line, by the analysis to carrier wave message, judges whether to check meter successfully, realizes carrier communication fault diagnosis.
6. electric power on-site terminal synthetic fault diagnosis method according to claim 1, is characterized in that: step (5), and the method for the electromagnetic interfere diagnose to electric power on-site terminal is,
(1) handheld terminal gathers the electromagnetic radiation value of corresponding electric power on-site terminal by high frequency probe group;
(2) collection signal of high frequency probe group is carried out A/D conversion by handheld terminal;
(3) sampled value is carried out to discrete Fast Fourier Transform iterative inversion, obtain require 30MHz～1000MHz frequency range in the spectrum distribution value of collection signal at GB9254-2008;
(4) peak-peak, the respective frequencies of above-mentioned spectrum distribution value are presented on handheld terminal;
(5) in the time that peak-peak surmounts GB9254-2008 limit value, be wherein 40dB μ V/m at 30～230MHz, be 47dB μ V/m at 230～1000MHz, the radiation limit value of electric power on-site terminal exceeds standard, and occurs electromagnetic interference (EMI) fault.
7. electric power on-site terminal synthetic fault diagnosis method according to claim 1, is characterized in that: step (6), to the meter reading data problem diagnosis method of electric power on-site terminal be,
(1) handheld terminal reads respectively the history data of corresponding electric power on-site terminal, electric power on-site terminal rear end connection ammeter, compare analysis, the consistance of checking electric power on-site terminal copy reading ammeter, if consistent, the meter reading data of electric power on-site terminal is normal; If inconsistent, the meter reading data of electric power on-site terminal breaks down, and carries out (2);
(2) there is reason in handheld terminal reads corresponding electric power on-site terminal communication log, logout, analysis of failure, finds out the leakage of copy reading ammeter and copy data.
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| CN114609999B (en) * | 2022-03-11 | 2024-10-11 | 格力博(江苏)股份有限公司 | Connection structure for outdoor power equipment diagnosis and diagnosis equipment |
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